o/snapstate: set userID from snapst and from opts as fallback for component installation (#17047)

Author: Mohit-Chachada

overlord/snapstate/component.go

@@ -188,8 +188,11 @@ func componentSetupsForInstall(ctx context.Context, st *state.State, names []str
 		return nil, err
 	}
 
-	// TODO:COMPS: figure out which user to use here
-	user, err := userFromUserID(st, opts.UserID)
+	userID, err := userIDForSnap(st, &snapst, opts.UserID)
+	if err != nil {
+		return nil, err
+	}
+	user, err := userFromUserID(st, userID)
 	if err != nil {
 		return nil, err
 	}

overlord/snapstate/component_install_test.go

@@ -1085,6 +1085,14 @@ func (s *snapmgrTestSuite) testInstallComponents(c *C, opts testInstallComponent
 	}
 	c.Assert(snapsupSetupProfiles.UserID, Equals, expectedUserID)
 
+	s.fakeBackend.ops.MustFindOp(c, "storesvc-snap-action")
+	for _, op := range s.fakeBackend.ops {
+		if op.op == "storesvc-snap-action" || op.op == "storesvc-snap-action:action" {
+			c.Assert(op.userID, Equals, expectedUserID,
+				Commentf("expected userID %d in op %q but got %d", expectedUserID, op.op, op.userID))
+		}
+	}
+
 	prepareKmodComps := setupTs.Tasks()[1]
 	c.Assert(prepareKmodComps.Kind(), Equals, "prepare-kernel-modules-components")